Breaking: At least 4 dead, several injured following mass shooting in a town in Canada

At least four people have been killed and several injured in a shooting in the eastern city of Fredericton, New Brunswick, Canadian police say.

Nick Moore, a local journalist reported hearing four gunshots at the scene around an hour ago. He posted video footage of the scene on Twitter, showing emergency vehicles outside a house.

Canadian police have advised residents of Brookside Drive to "stay in their homes with doors locked at this time for their safety". They added that the public should avoid the area and promised that more details will be provided soon.

Authorities described the shooting as an "active incident".